Supplements · 5 min read · Due Team
CoQ10 for Egg Quality: Does It Actually Work?
CoQ10 is one of the most widely recommended fertility supplements. Here's what the research supports, what it doesn't, and who it's most likely to help.
CoQ10 (coenzyme Q10) has become a staple in fertility supplement routines — particularly for people trying to conceive over 35 or with diminished ovarian reserve. The science behind it is more solid than most supplements, but it's not a guaranteed fix.
What CoQ10 does
CoQ10 is an antioxidant that plays a central role in mitochondrial energy production. Eggs are among the most energy-intensive cells in the body — they rely heavily on mitochondrial function during maturation and fertilization. CoQ10 levels in the body decline with age, which correlates with the age-related decline in egg quality.
What the research shows
Animal studies have shown CoQ10 supplementation can improve egg quality and reverse some age-related fertility decline. Human studies are more limited but supportive — particularly for people undergoing IVF, where CoQ10 supplementation has been associated with better ovarian response and embryo quality in some trials.
Who is most likely to benefit
- People over 35, where mitochondrial decline is more significant
- Those with diminished ovarian reserve or low AMH
- People preparing for IVF who want to optimize egg quality before retrieval
Dosage and form
Most fertility protocols use 400 to 600 mg per day. Ubiquinol (the reduced form) is better absorbed than ubiquinone, particularly for people over 35. It takes at least 60 to 90 days to potentially affect egg quality.
The bottom line
CoQ10 has a plausible mechanism, supportive evidence, and a strong safety profile. It's one of the more defensible fertility supplements, particularly for older reproductive age or diminished reserve.
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